Níveis de fitase em rações para suínos em fase de terminação

Lozano, Arturo Pardo; Pacheco, Graziela Drociunas; Silva, Cairo A.; Bridi, Ana Maria; Silva, R. A. M. S.; Vinokurovas, Sylvia Luiza; Dalto, Danyel Bueno; Tarsitano, Maria Aparecida Anselmo; Agostini, P. S.

doi:10.4321/s0004-05922011000400001

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…expressed in Trichoderma reesei (250, 500, and 1,000 FYT/kg feed), and also found by Fandrejewski et al [33], who used a 3-phytase originated from and expressed in Aspergillus niger (1,000 FYT/kg feed) during the growing period. However, Lozano et al [38], when working with Aspergillus niger phytase supplementation of finishing pigs, observed greater loin depth with 500 and 1,000 FYT/kg feed compared to the control group.…”

Section: Discussionmentioning

confidence: 99%

Increasing doses of phytase from Citrobacter braakii in diets with reduced inorganic phosphorus and calcium improve growth performance and lean meat of growing and finishing pigs

et al. 2019

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The objective of this study was to evaluate the effect of increasing doses of bacterial phytase (RONOZYME HiPhos) on performance and carcass characteristics of growing and finishing pigs. The study included 120 castrated males with initial weight of 23.21 ± 1.91 kg and 68 days of age, distributed in a randomized block design with five treatments and eight replicates with three animals each. The pigs were fed five corn-soybean meal-based diets: positive control (PC), supplemented with inorganic phosphorus and calcium; negative control (NC), with 0.13% reduction in available phosphorus and 0.11% in calcium; and three NC diets supplemented with 1,000, 2,000, and 3,000 phytase units (FYT)/kg in the feed. Compared with the NC diets without phytase, diets with 1,000, 2,000, and 3,000 FYT/kg inclusion increased the daily weight gain by +12% (quadratic, p<0.05) during the growing I period; +2.9, +2.9, and +10.5% (linear, p<0.01), respectively, during the growing II period; and +4.1, +5.1, and +8.2% (linear, p<0.001), respectively, over the entire experimental period. The daily feed intake increased by 0, +2.8, and +4.3% (linear, p<0.05), respectively, considering the entire experimental period; and the final live weight increased by +3.2, +4.2, and +6.1% (linear, p<0.001), respectively. The phytase treatments did not influence feed conversion ratio, carcass weight and yield, backfat thickness, loin depth and carcass lean meat. According to the European Carcass Classification (SEUROP), however, the animals fed the PC diet and the three phytase levels had more carcasses classified as E (between 55–60% lean meat) when compared to carcasses of pigs fed the NC. Supplementing increasing levels of phytase to a corn- and soybean meal-based diet with inorganic P and Ca reduction improved daily weight gain and feed intake of growing pigs, and such effects were maintained until slaughter age.

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Section: Discussionmentioning

confidence: 99%

Increasing doses of phytase from Citrobacter braakii in diets with reduced inorganic phosphorus and calcium improve growth performance and lean meat of growing and finishing pigs

et al. 2019

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“…Phytase originated and expressed in A. niger (1000 FYT/kg of feed) during the growth period did not influence carcass characteristics [ 29 ]. However, Lozano et al [ 40 ] supplemented feed with A. niger -based phytase for finishing pigs and observed a greater loin depth in treatment groups that received 500 and 1000 FYT/kg of feed than in the NC group. Similarly, Brady et al [ 41 ] reported a linear increase in dorsal fat thickness and a linear decrease in lean meat content with the use of a Peniophora lycii phytase (500, 750, and 1000 FYT/kg of feed).…”

Section: Discussionmentioning

confidence: 99%

Increasing Doses of Bacterial Phytase (Citrobacter braakii) Improves Performance and Carcass Characteristics of Pigs in Growing and Finishing Phases

Silva

Callegari²,

Dias³

et al. 2022

Animals

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The effects of increasing doses of bacterial phytase (Citrobacter braakii) on performance and carcass characteristics of growing-finishing pigs was evaluated. A total of 120 barrows weighing 25.16 ± 2.80 kg and 68 days old were submitted to five treatments: positive control diet (PC) containing inorganic phosphorus (P) and limestone (Ca); negative control (NC) with reductions in P (by 0.13%) and Ca (by 0.11%); and three NC diets supplemented with 1500 (NC15), 3000 (NC30) and 4500 (NC45) units of phytase (FYT)/kg. The daily weight gain (DWG) in growth phase I (68–91 days) was higher in the PC, NC15 and NC30, compared to the NC (1.06, 1.06, 1.06 vs. 0.95, respectively). The DWG in finishing phase II (141–156 days) was higher in the NC15 (1.20 kg) and NC30 (1.14 kg) than in the NC45 (0.94 kg). The final weights (LW156) in the NC15 (122.95 kg LW) were higher than NC (116.47 kg LW) and NC45 (114.43 kg LW). Over the entire period, a quadratic effect (2012 FYT) was observed for the DWG. The increasing levels of phytase in corn and soybean meal-based diets improved the DWG and carcass traits; however, the addition of more than 3000 FYT/kg of feed should be carefully studied to determine enzyme viability.

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